页面使用FileUpload后,点击后退会出现页面过期,怎么解决

sxmonsy 2008-10-15 11:25:08

如题页面使用FileUpload后,点击浏览器的后退按钮会出现页面过期,怎么解决.
以下是前后台代码:



  

         <table  style="width:100%" cellspacing="1">

            <tr>

                <td style="width:13%" class="td3">

                    <asp:LinkButton ID="lbGreat" runat="server" Font-Size="13px" OnClick="lbGreat_Click" ForeColor="DarkSlateBlue" >优秀作品</asp:LinkButton></td>

                <td style="width:13%" class="td3">

                    <asp:LinkButton ID="lbAll" runat="server" Font-Size="13px" OnClick="lbAll_Click" ForeColor="DarkSlateBlue">全部作品</asp:LinkButton></td>

                <td style="width:13%" class="td3">

                    <asp:LinkButton ID="lbPerson" runat="server" Font-Size="13px" OnClick="lbPerson_Click" ForeColor="DarkSlateBlue">我的作品</asp:LinkButton></td>

                <td  style="width:13%" class="td3">

                    <asp:LinkButton ID="lbUp" runat="server" Font-Size="13px"  OnClick="lbUp_Click" ForeColor="DarkSlateBlue">上传作品</asp:LinkButton></td>

                <td  style="width:48%" class="td3">

        

            </tr>

           

        </table>

        

    <div>

        <asp:Panel ID="PanList" runat="server" Width="100%" Visible="false">

        </asp:Panel>

        <asp:Panel ID="panGrid" runat="server" Width="100%" Visible="false">

        </asp:Panel>

        <asp:Panel ID="panUpIma" runat="server" Width="100%" Visible="false">

            <asp:FileUpload ID="FileUpload1" runat="server" Width="420px"  CssClass="td1"/></td> //问题所在

            <asp:Button ID="btUp" runat="server" Text="上传"  CssClass="anly" OnClick="btUp_Click"/>

        </asp:Panel>

        <asp:Panel ID="PanPy" runat="server" Width="100%">

        </asp:Panel>

        </div>

后台



  #region 全部作品

    protected void lbAll_Click(object sender, EventArgs e)

    {

        PanList.Visible = true;

        panGrid.Visible = false;

        panUpIma.Visible = false;

        PanPy.Visible = false;

    }

    #endregion

    #region 优秀作品

    protected void lbGreat_Click(object sender, EventArgs e)

    { 

        PanList.Visible = true;

        panGrid.Visible = false;

        panUpIma.Visible = false;

        PanPy.Visible = false;

    }

    #endregion

    #region 我的作品

    protected void lbPerson_Click(object sender, EventArgs e)

    {

        PanList.Visible = false;

        panGrid.Visible = true;

        panUpIma.Visible = false;

        PanPy.Visible = false;

    }

    #endregion

    #region 上传作品

    protected void lbUp_Click(object sender, EventArgs e)

    {      

        PanList.Visible = false;

        panGrid.Visible = false;

        panUpIma.Visible = true;

        PanPy.Visible = false;

    }

    #endregion